Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001RWCO
Model Year Start: 2021 Model: RAV4 HV Prod Date Range: [08/2020 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): SYSTEM DESCRIPTION; 2021 - 2024 MY RAV4 HV [08/2020 -        ]

SYSTEM DESCRIPTION

COMMUNICATION SYSTEM FUNCTION

(a) Air conditioning amplifier assembly transmits and receives the signals in each ECU via the CAN communication system and LIN communication system. Also, the air conditioning amplifier assembly transmits and receives the damper position, damper operation, sensor status, etc., signals to and from each actuator.

Air Conditioning Amplifier Assembly ←→ Airbag Sensor Assembly

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Airbag sensor assembly

Front passenger's seat occupant status

CAN

Front passenger's seat belt buckle switch status

Air Conditioning Amplifier Assembly ←→ Main Body ECU (Multiplex Network Body ECU)

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Main body ECU (multiplex network body ECU)

Auto dimmer

CAN

Front passenger courtesy switch

Rear courtesy switch LH

Rear courtesy switch RH

Country code 1st, 2nd, 3rd

Steering wheel

Solar data (R)

Solar data (L)

Windshield temperature

Ambient temperature of humidity sensor

Main body ECU (multiplex network body ECU)

Air conditioning amplifier assembly

Ambient temperature display

CAN

Air Conditioning Amplifier Assembly ←→ Rack and Pinion Power Steering Gear Assembly (Power Steering ECU)

Receiver

Sender

Signal

Communication Line

Rack and pinion power steering gear assembly (power steering ECU)

Air conditioning amplifier assembly

Ambient temperature display

CAN

Air Conditioning Amplifier Assembly ←→ Combination Meter Assembly

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Combination meter assembly

Vehicle speed (meter to other)

CAN

Front passenger's seat occupant status

Combination meter assembly

Air conditioning amplifier assembly

Ambient temperature display

CAN

Switch signal of 0 or 0.5 below decimal point of ambient temperature display

A/C load limitation warning

Air Conditioning Amplifier Assembly ←→ Hybrid Vehicle Control ECU Assembly

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Hybrid vehicle control ECU assembly

ECO mode indicator

CAN

Driver mode select

Battery maximum temperature

State of STB (Standby)

Compulsion recycle request

Communication A/C inverter and HV ECU

No electrical heater request

A/C permission electric power

Ready

A/C inverter main voltage

A/C inverter output

Motor over load information

Motor start information

A/C inverter internal power source malfunction

STB wire short

A/C inverter temperature information

Self check

Thermistor cold temperature malfunction

BTC down

A/C motor revolution

A/C input power

A/C inverter temperature

A/C-Inverter CPU error flag

A/C-Inverter CPU initialization flag

A/C inverter identification

Engine type information 1 - 4

HV flag

ECO-run flag

Hybrid vehicle control ECU assembly

Air conditioning amplifier assembly

Refrigerant gas pressure sensor

CAN

In-vehicle temperature

Heating performance assistance request to transmission system

Heater idle up request

Front blower level indicator

ECO switch information

Engine on request

Charging control inhibit

Electro motion compressor target revolutions

Ambient temperature before correction

Ambient temperature display

Electro motion compressor start

Prior A/C control request

Standby for inverter request

Inlet state (for cooling battery)

A/C control state

Air Conditioning Amplifier Assembly ←→ ECM

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

ECM

Engine speed data

CAN

Voltage of accessory battery

Compulsory internal air circulation command signal at high water temperature

Water temperature

ECM

Air conditioning amplifier assembly

Heating performance assistance request to transmission system

CAN

Motor cooling fan drive request

Heater idle up request

Ambient temperature before correction

Ambient temperature display

Prior A/C control request

Air Conditioning Amplifier Assembly ←→ Inverter with Converter Assembly

Receiver

Sender

Signal

Communication Line

Inverter with converter assembly

Air conditioning amplifier assembly

Ambient temperature before correction

CAN

Ambient temperature display

Prior A/C control request

Air Conditioning Amplifier Assembly ←→ Air Conditioning Control Assembly

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Air conditioning control assembly

Independent control A/C information

LIN

AUTO switch operation

OFF switch operation

A/C switch operation

ECO switch operation

Blower switch operation

S-FLOW switch operation

Auto/manual identification information

Air outlet switch operation

DUAL switch operation

Driver side set temperature switch operation

Heater/cooler identification information

Front passenger side set temperature switch operation

Recirculation/fresh switch operation

S-FLOW select information

Blower customize select information

Air conditioning control assembly

Air conditioning amplifier assembly

S-FLOW display instruction

LIN

Blower customize display instruction

ECO display instruction

Entire front panel display instruction

AUTO display instruction

Blower level display instruction

Recirculation display instruction

Air outlet display instruction

DUAL display instruction

Driver side set temperature display instruction

Front passenger side set temperature display instruction

A/C display instruction

Air Conditioning Amplifier Assembly ←→ Damper Servo

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

No. 1 air conditioning radiator damper servo sub-assembly

Damper arm position

LIN

No. 2 air conditioning radiator damper servo sub-assembly

No. 3 air conditioning radiator damper servo sub-assembly (w/ Driver Seat Centralized Control)

No. 1 blower damper servo sub-assembly

No. 1 air conditioning radiator damper servo sub-assembly

Air conditioning amplifier assembly

Damper arm position

LIN

No. 2 air conditioning radiator damper servo sub-assembly

No. 3 air conditioning radiator damper servo sub-assembly (w/ Driver Seat Centralized Control)

No. 1 blower damper servo sub-assembly

Air Conditioning Amplifier Assembly ←→ Blower Motor, Sensor, Switch etc.

Receiver

Sender

Signal

Communication Line

Air conditioning amplifier assembly

Cooler thermistor (room temperature sensor)

Sensor value

Direct line

Thermistor assembly

Air conditioner pressure sensor

No. 1 cooler thermistor

Integration control and panel assembly

ECO switch

Blower with fan motor sub-assembly

Air conditioning amplifier assembly

Drive

Direct line